Question

Urea (NH2CONH2), an important nitrogen fertilizer, is produced industrially by the reaction
2NH3(g)+CO2(g)→NH2CONH2(aq)+H2O(l)
Given that ΔG∘ = -13.6 kJ, calculate ΔG at 25 ∘C for the following sets of conditions. (Figure 1)

1) 20 atm NH3, 20 atm CO2, 4.0 M NH2CONH2

2) 9.0×10⁻² atm NH3, 9.0×10⁻² atm CO2, 1.0 M NH2CONH2

Is the reaction spontaneous for the conditions in part (a) and/or part (b)?

spontaneous for the conditions in part (b), nonspontaneous for the conditions in part (a)

nonspontaneous for the conditions in both parts

spontaneous for the conditions in part (a), nonspontaneous for the conditions in part (b)

spontaneous for the conditions in both parts

Answer 1